they also managed to break away briefly-- president obama for a visit to the hoover dam, and governor romney out with an aide to buy lunch, a burrito. meanwhile, their running mates made multiple stops in key states. vice president biden told a crowd in charlotte, north carolina that mitt romney would raise taxes on most americans to fund tax cuts for the wealthy. >> how they can justify raising taxes on the middle class has been buried the last four years. how in lord's name can they justify raising their taxes with these tax cuts? look, folks, we've seen this movie before. massive tax cuts for the wealthy. eliminating restrictions on wall street. let the banks write their own rules. we know where it ends. it ends in a catastrophe of the middle class and the great recession of 2008. folks, we cannot go back to that. >> woodruff: the republican national committee and the romney campaign seized on biden's remark about the middle class. they called it a "stunning admission" that the president's policies have been bad for the economy and the middle class. but biden-- at his next stop, in ashevi